When Kanao Tsuyuri from Demon Slayer: Kimetsu no Yaiba was a kid, she was roughly 11 years old when she was saved, though her severe malnutrition made her look like she was between 5 and 7 years old.Chronological Age: She was approximately 11 years old during her childhood flashback scene.Physical Appearance: Due to starvation and extreme neglect by her biological parents, her growth was heavily stunted.Before being saved: She wore a ragged, filthy, oversized dark robe or kimono tied loosely with a simple rope. She was barefoot, caked in dirt, and a thick rope was tied around her waist by her captor to lead her like an animal.She wore no shoes, was covered in bruises, and was tied up by a rope around her waist when being sold.Texture: Her hair was severely disheveled, bushy, and unkempt.Color: At this stage, her hair was a solid, dusty black before later transitioning to pink tips.Style: It was completely loose, messy, and covered in dirt

Shinobu was around 14 years old. At this younger age, Shinobu had a more brash, blunt, and openly impatient personality—contrasting with her later polite, smiling facade. Her hair was styled with chin-length strands tucked in, and she wore a darker purple Demon Slayer uniform with silver buttons and a plain white haori.Age and TimelineAge: ~14 years old with her older sister when they encountered and purchased Kanao from a man on the street.Hair: Dark hair with chin-length side strands tucked in neatly around her ears.Uniform: A younger-style Demon Slayer uniform featuring a darker shade of purple cloth with silver buttons.Haori: A plain, simple solid white haori Shinobu was more outspoken, blunt, and openly emotional (often quick to anger or irritation) compared to her later calculated, perpetually smiling demeanor. She was already fiercely protective and impatient with cruelty, famously telling Kanae they should just leave Kanao with them.

In the anime and manga series Demon Slayer: Kimetsu no Yaiba, the person who sold Kanao Tsuyuri was her biological father, while the man buying and leading her by a rope was an unnamed slave trader (human trafficker).Her Biological Father (The Seller)Ruthless and Sadistic: He regularly beat, starved, and tortured his eleven children. He went as far as drowning them in water jars or stamping on them if they cried.Callous and Greedy: He viewed his offspring entirely as expendable property or burdens. He did not even bother to give Kanao a name. He sold her off into slavery the moment he could get cash for her.Completely Unloving: He lacked any trace of paternal instinct or basic human empathy, directly causing the deaths of several of Kanao's siblings through pure physical violence.The Slave Trader (The Buyer)Dehumanizing and Brutal: He treated Kanao like livestock, keeping her filthy, covered in bugs, and dragging her through the streets tied by a rope around her waist.

Aoi Kanzaki: After her family was killed by demons, Aoi was taken in by the Kocho sisters at the Butterfly Mansion to be raised.Hair: Dark blue-black hair styled into two parted, high twintails secured with two blue butterfly clips (similar in style to Kanae). ​Face: Expressive blue eyes and thick eyebrows, often seen wearing an angry or flustered expression. ​Clothing ​Uniform: Wears a dark, sleeveless Demon Slayer uniform trimmed with white, though she rarely wears it on missions. ​Main Attire: Typically wears a plain white, long-sleeved dress/apron over her uniform to reflect her medical role at the Butterfly Mansion, along with a blue belt sash around her waist. Never leave kanae.